Spacer for reinforcing elements of concrete structures



A. E. SMALL. SPACER FOR REINFORCING ELEMENTS 0F CONCRETE STRUCTURES.

APPLICATION FILED MAY 3, I920.

1,356,021, Patented o t 19,1920.

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1 blank UNITED STATES PATENT OFFICE.

ARTHUR E. SMALL, OF CHICAGO, ILLINOIS.

Application filed May 8, 1920. Serial No. 379,919.

To all whom it may concern Be it known that I, ARTHUR E. SMALL, acitizen of the United States, residing at Chicago, in the county of Cookand State of Illinois, have invented new and useful Improvements inSpacers for Reinforcing Ele ments of Concrete Structures, of which thefollowing is a specification.

This invention relates to the art of reinforced concrete buildingconstruction, and more particularly to devices for spacing thereinforcing elements from each other and from the mold while theconcrete is being put in the mold.

The invention has for its object to provide a very simple, inexpensiveand efficient spacing device of the kind stated, and to this end itconsists in a novel combination and arrangement of parts to behereinafter described and claimed.

In order that the invention may be better understood, reference is hadto the accompanying drawing forming a part of this specification, and insaid drawing,

Figure 1 is a front elevation of one of the devices;

Fig. 2 is a side elevation thereof;

Fig. 3 is a detail in perspective;

Fig. i is a plan view of a fragment of a out of which the devices aremade, and

Fig. 5 is a cross section of a mold showing the manner in which thedevices are used.

Referring specifically to the drawing, 10 denotes the fragment of a moldfor forming a reinforced concrete beam or other building element. In themold are placed reinforcing members such as rods 11, and these membersare held spaced from each other and from the mold while the concrete isbeing put in the latter, by the devices which are the subject matter ofthe present application for patent.

Close to the bottom of the mold 10 is placed a transverse bar 12 whichis supported by a number of chairs having seats for the rods 11. Eachchair is a plate which is angular in cross-section to form a web 13 andoutstanding end flanges 1 1, said flanges projecting in oppositedirections. The bar 12 has apertures 15 at regular intervals throughwhich the chair members are stuck to project from the top and also fromthe bottom of the bar. The chair members are thus held spaced, and theyseat on the bot- Specification of Letters Patent.

Patented Oct. 19, 1 920.

tom of the mold as shown in Fig. 5, to hold the bar 12 in place withinthe mold and spaced from the bottom thereof. The oppositely projectingend flanges 14 prevent the chair members from tipping over, and saidmembers are thus held standing in upright position.

The rods 11 are laid on the top edges of the webs 13 of the chairmembers, and said edges are made slightly concave to provide a betterseat for the rods. Tie wires 16 are employed for anchoring the rods tothe chair members, said wires being passed through apertures 17 in thewebs 13 and around the rods, with the ends of the wires united by beingtwisted together as shown in Figs. 1, 2 and The rods 11 are thus firmlytied to the chair members so that their posi-.

tion is not disturbed when the concrete is put in the mold.

The aperture 17 is produced by cutting or punching a tongue 18 from theweb, and this tongue is bent to extend laterally therefrom and seat ontop of the bar 12.

It will be noted that the flanges 14: have their outer edgesstepped toproduce shoulders 19 on top of which the bar 12 seats, said shoulderstherefore preventing the bar from slipping down on the chair member, andserving to hold the bar spaced from the base of the chair member toobtain the proper spacing from the mold bottom. The outer edges of theflanges 1 1 are also inclined so that they are wider at the bottom thanat the top to obtain greater stability.

The chair members can be cut from a long sheet metal strip so that thereis no waste of material, Fig. 1 of the drawing illustrating a fragmentof this strip. The devices can therefore be cheaply produced.

I claim:

1. A device of the character described comprising an apertured bar, achair member seating in the aperture of the bar and projecting fromopposite sides thereof, the edge of one of the projecting portions ofthe chair member having a seat to support a reinforcing element, andsaid projecting portion below said seat having an aperture to seat a tiewire, and the other projecting portion forming the supporting base ofthe chair member.

2. A device of the character described comprising an apertured bar, achair member seating in the aperture of the bar and projecting fromopposite sides thereof, the

edge of one of the projecting portions of the chair member having a seatto support a reinforcing element and said projecting portion having anoutstanding abutment seating on the bar, and the other projecting!portion forming the supporting;- base e? the chair member said chairmember i flii'igi shouldered side edges forming seats for the aforesaidbar. 7

3. A device of the character descrii comprising an apertured bar, achair member seating in the aperture of the bar and composed of a Weband outstanding flanges at the ends thereof, said chair member jectingfrom opposite sides of the bar, the edge of one of the projectingportions of the chair member having a seat to support a reinforcingelement and the other projecting portion forming the supporting base ofthe chair member.

at. A device of the character described comprising an apertured bar, achair member seating in the aperture of the bar and composed of a Weband outstanding flanges at the ends thereof, said chair memberprojecting from opposite sides of the bar, the edge of one of theprojecting portions of the chair member having a seat to support areinforcing elemen and the other project ing portion forming thesupporting base of the chair member, the extremities of the aforesaidflanges being shouldered to form seats for the bar.

A device of the character described comprising an a-pertured bar, achair member seating in the aperture of the bar and composed of a veband outstanding flanges at the ends thereof, said chair member pro--jecting from opposite sides of the bar, the ed ge of one of theprojecting portions of the chair member hfiViflg a seat to support areinforcing element and provided with an aperture below said seat toreceive a tie Wire and the other projecting; portion forming thesupporting base of the chair member.

In testimony whereof I affix my signature.

ARTHUR E. SMALL.

